from pydantic_settings import BaseSettings, SettingsConfigDictclass Settings(BaseSettings):    model_config = SettingsConfigDict(env_file='.env')    db_host: str = 'localhost'    db_port: str = '3306'    db_user: str = 'root'    db_pass: str = 'Aqilmini886'    db_name: str = 'wx_app'    db_url: str = f'mysql+pymysql://{db_user}:{db_pass}@{db_host}:{db_port}/{db_name}?charset=utf8mb4'    secret_key: str = 'secret_key'settings = Settings()